CN205658098U - Warmhouse booth CO2 fertilization control system - Google Patents

Abstract

The utility model relates to a warmhouse booth's CO2 fertilization control system belongs to agricultural product production technical field, relates to warmhouse booth's environmental factor control, the utility model discloses control system includes treater, key acquisition module, illumination intensity collection module and valve control module, preserve the CO2 saturation point of every kind of plant under different illumination intensity in treater built -in memory and the parameter setting module, memory, the treater reads the plant variety of key acquisition module input and the illumination intensity that illumination intensity collection module confirms, looks for the CO2 saturation point that corresponds in the memory, confirms the CO2 volume of discharging to turn into the CO2 volume of discharging on the valve of the opening time of valve, valve control module control CO2 air supply. The utility model discloses a plant to CO2's demand, gives appropriate replenishment under different light intensity, improve the photosynthetic rate of plant, improves economic benefits.

Description

A kind of warmhouse booth CO2Fertilization control system

Technical field

This utility model belongs to Internet of Things applied technical field, and the envirment factor relating to warmhouse booth controls, and is specifically related to CO to a kind of warmhouse booth₂Fertilization control system.

Background technology

Along with updating of technology of facilities and breeding and cultivation technology, industrialized agriculture crop yield has obtained greatly Improve, but the yield that the disadvantageous growing environment factor makes agricultural crops actual only played about the 24% of its productive potentialities, Limit the raising of yield.

CO₂It is that crop carries out one of photosynthetic raw material, therefore, CO₂Concentration is that to affect of plant growth critically important Envirment factor.CO₂Fertilising can strengthen vegetable to biotic stress and the resistance of abiotic stress, the mineral of change vegetable crop Matter absorbs and distribution, also affects the ultrastructure of vegetable crop simultaneously.Crop carries out photosynthesis can consume substantial amounts of CO₂If, Indoor CO₂Can not get supplementing in time, CO₂Concentration can decline rapidly.In the case of stuffy, CO₂Concentration can be reduced to crop CO₂ Below compensation point, even if in the case of ventilating, indoor CO₂Concentration is likely to less than outdoor CO₂Concentration.Therefore, too low CO₂Dense Degree has become the key constraints that protected crop is photosynthetic, constrains crop growth, reduces crop yield and quality.

Although there being some places using CO₂, have received good result after the envirment factor control method such as humidity, but a lot After place not yet uses or uses, poor effect, even some place in use have also appeared some problems, the most right CO₂Fertilization effect is demoted to praise and is differed.Why there will be above-mentioned situation, main cause has China to lack low cost, safety, operation letter CO single, that gas production is high, easily controllable₂Generation equipment and shortage enrich CO₂Rich water quality management measure rational to crop afterwards.

Summary of the invention

In order to overcome the deficiencies in the prior art, this utility model provides the CO of a kind of warmhouse booth₂Fertilization control system is logical Cross conditions such as considering floristics, growing stage, cultivation condition and other environmental factorss, select suitable CO₂The side of enriching Method, fertilising concentration and fertilization time.

The technical solution of the utility model is: the CO of a kind of warmhouse booth₂Fertilization control system, including processor, button Acquisition module, intensity of illumination acquisition module, valve control module and Temperature Humidity Sensor, described processor internal memory and ginseng Number arranges module, preserves various plants CO under different illumination intensity in memorizer₂Saturation point, Temperature Humidity Sensor will gather To data export to processor, processor reads the plant variety data of key acquisition module input and intensity of illumination gathers mould The intensity of illumination that block detects, searches the CO that in memorizer, this kind of plant is corresponding under a certain intensity of illumination₂Saturation point, confirms CO₂ The amount of discharging, realizes CO by valve control module₂Release control.

Above-mentioned parameter arranges module and also includes that intensity of illumination acquisition module gathers the time point setting of intensity of illumination, tool every day Body, in 3-4 middle of the month, sunrise detects intensity of illumination, late April to May after 1 hour, sunrise detects, in November after half an hour To February, sunrise detection in 2 hours.Plant variety, intensity of illumination and CO in memory₂Synopsis in, intensity of illumination exists 27W·m^-2Time above, CO₂The amount of discharging is more than 0.Control system also includes fan control module and blower fan, and described blower fan is at booth Internal bidirectional circulating arrangement, its direction of rotation is internally formed circulating current for making booth.Concrete, blower fan height distance ground 10 To 20 centimetres, forming the 10-20 degree elevation angle with ground, the direction of rotation of blower fan hoists flowing from lower for making air-flow.Blower fan wind Speed is located at 0.3～1.0m s^-1In the range of, the boundary layer resistance of plant leaf blade reduces, and stomatal conductance increases；Changing of described blower fan Gas speed is 10h^-1, namely every 6min blower fan start and stop are once.Above-mentioned electromagnetic valve one end and CO₂Source of the gas UNICOM, the other end is even Connecing airway, a diameter of 2cm of airway, the other end is closed, described airway is provided with an a diameter of 2mm's at interval of 1 meter Aperture.Control system also includes CO₂Concentration detection module, CO₂Concentration detection module is discharging CO₂After gas fertilizer, detect CO in real time₂ Concentration change, the CO inside and outside booth₂After concentration is consistent, to booth forced ventilation.When to booth forced ventilation, the wind in booth Machine one-way only operation, its direction of rotation is internally formed one-way flow air-flow for making booth.CO₂The amount of discharging compare CO₂Saturation point low.

This utility model has a following good effect: by plant under different light intensity to CO₂Demand, it is suitable to give Supplement, improve the photosynthetic rate of plant, increase economic efficiency.

Accompanying drawing explanation

Fig. 1 is the CO of this utility model detailed description of the invention₂Fertilization control system structure chart.

Fig. 2 is the wind turbine layout figure of this utility model detailed description of the invention.

In figure, 1, blower fan.

Detailed description of the invention

Below against accompanying drawing, by the description to embodiment, the most involved each of detailed description of the invention of the present utility model Mutual alignment between the shape of component, structure, each several part and annexation, the effect of each several part and operation principle, manufacture work Skill and operate with method etc., is described in further detail, to help those skilled in the art to invention of the present utility model Design, technical scheme have more complete, accurate and deep understanding.

This utility model system includes processor, key acquisition module, intensity of illumination detection module, CO₂Concentration Testing mould Block, fan control module and solenoid valve control module, include memorizer and parameter setting module, key acquisition module in processor Parameter is inputted, due to the CO of different plants for user₂Saturation point is different, therefore must input plant by key acquisition module Kind, further, since seasonal shift, sunrise time, in change, also implies that plant carries out the photosynthetic time in change, uses Family needs to arrange the acquisition time of intensity of illumination detection module, namely CO₂Discharge the time.By key acquisition module, user It is manually entered type and CO every day of plant₂Discharge time point, in memory, pre-set every kind of plant at different light According to the CO under intensity₂Saturation point, controller determines the CO needing to discharge by lookup table mode₂Volume, CO₂Volume be converted into and execute Put the time, namely the ON time of electromagnetic valve.

Due to CO₂Density bigger than air, so CO₂Deposit to bottom booth, affect plant canopy CO internal with group₂ Be uniformly distributed, thus impact enrich CO₂The effect that gas is fertile.Plant carries out photosynthesis and consumes substantial amounts of CO₂If wind speed is less, CO can be made₂Diffusion rate slow down, cause the internal CO of phytobiocoenose₂Can not get supplementing in time, thus reduce the photosynthetic speed of plant Rate.Inside booth, increase Fan Equipment, be conducive to the air circulation improved within booth, make the CO in booth₂It is evenly distributed, Meanwhile, the boundary layer resistance of plant leaf blade reduces, and stomatal conductance increases, and improves CO₂Transformation efficiency.

As in figure 2 it is shown, this utility model sets up multiple blower fan inside booth, in making booth, form circulating current, blower fan 10 to 20 centimetres of height distance ground, forms the 10-20 degree elevation angle with ground, and wind speed is located at 0.3～1.0m s^-1In the range of.By wind Machine is located at the height that distance ground is certain, and has certain elevation angle, blower negative pressure face to be the side near ground with ground, this Highly can ensure that when blower fan operates, the suction surface air circulation of blower fan will not be hindered, if getting too close to ground, because Air circulation is obstructed, and can produce bigger noise.The 10-20 degree elevation angle can be by the CO of deposition₂Hoist diffusion, it is ensured that plant is preced with Layer is to CO₂Demand.Wind speed is at 0.3～1.0m s^-1In the range of time, the boundary layer resistance of plant leaf blade reduces, and stomatal conductance increases Greatly, CO is enriched₂Effect increase.If wind speed is too high, the part holes of plant can be caused to close, stomatal conductance reduces, CO₂Turn Change efficiency to reduce.

Greenhouse air exchanging rate under ventilation state is at 10h^-1More than secondary, therefore, blower fan of the present utility model can use The mode of batch operation, the averagely every 6min of blower fan works once, depending on the duration of every task is because of the distance between blower fan, it is ensured that The air in whole greenhouse all circulation, CO₂It is evenly distributed, then can shut down.

CO of the present utility model₂Source of the gas uses the CO of bottled liquid₂, the CO of bottled liquid₂Concentration is easily controlled, convenient peace Entirely, by airway and aperture thereon by CO₂It is applied to uniformly in warmhouse booth, conduit is fixed on the top of booth, A diameter of 2cm of airway, one is connected with steel cylinder gas vent, a closing, makes a call to a diameter at interval of 1 meter on airway It is about the aperture of 2mm.The gas vent of steel cylinder is by electromagnetic valve control.

Due to the Repiration in plant night, cause the CO in canopy₂Concentration raises, these CO₂Just can be as plant day Between photosynthesis raw material, the CO after sunrise 1-2 hour, in canopy₂Concentration is higher than extraneous concentration, may advantageously facilitate plant Photosynthesis, it is not necessary to additionally apply CO₂Gas is fertile.This utility model control system is after sunrise 1-2 hour, further according to current The environmental factorss such as intensity of sunshine, it is considered to CO₂Fertilising.At rainy weather, photosynthesis is not strong, is not suitable for applying gas fertile.

Concrete, in 3-4 middle of the month, sunrise detected CO after 1 hour₂Concentration, late April to May, after sunrise half an hour Detection CO₂Concentration, in November to February, sunrise 2 hours detection CO₂Concentration, because the temperature in winter is relatively low, intensity of sunshine The most on the low side, photosynthetic rate is relatively low, CO after general two hours₂Lowering of concentration to reduced levels.Summer temp is higher, needs to ventilate Lower the temperature in booth, but even if being always maintained at ventilating, the CO within booth₂Concentration also will be less than extraneous 5%-10%, summer Season booth CO₂Fertilising concentration unsuitable too high, maintain the CO being bordering on air₂Concentration level, has significant effect.Largely The upper Net Photosynthetic Rate improving plant.By CO₂Concentration enriches outdoor horizontal, even if the air exchanging rate of booth is quickly, also will not There is CO₂Spill into outdoor, now, enrich CO₂Utilization ratio be about 1.

The portable instrument for determining photosynthesis of TPS-2 is set in booth and measures CO₂Concentration, with illumination intensity sensor survey The intensity of illumination that amount is indoor, intensity of illumination can be to CO₂Compensation point and saturation point produce impact, by organizing Experimental comparison more, 8.5,27,61,129,265W·m^-2Under light intensity, observe 300 to 1000umol mol respectively^-1CO₂Photosynthetic speed under concentration Rate, finds 8.5W m^-2Under light intensity, increase CO₂Concentration to photosynthetic rate improve inconspicuous, 27W m^-2Under light intensity, photosynthetic speed Rate is from 5umol m^-2·s^-1Increase to 10umol m^-2·s^-1, increase more obvious, 61,129,265W m^-2Under light intensity, light Conjunction speed becomes apparent from, and therefore, this utility model selects 27W m^-2As reference value, at 27W m^-2More than light intensity, it is considered to give Plant applies CO₂Gas is fertile.

Different floristics is to CO₂Absorption efficiency the most different, C3 plant is to CO₂Absorption efficiency with CO₂Concentration, The impact variation of the factors such as light intensity is relatively big, but C4 plant is in the case of other conditions meet, 330umol mol^-1Time, light Close speed not to be further added by, and the CO of outdoor₂Concentration can meet this requirement substantially.

During actual use, CO will be set₂The amount of discharging lower than actual saturation point, because CO₂Absorption be also subject to To the impact of other envirment factors, but this is a complicated process being in dynamically change, is difficult to determine a definite value, because of This, by CO₂Saturation point arrange ratio actual value low, it is ensured that CO₂Concentration is not over saturation point, it is to avoid excessive CO₂Dense Degree, unfavorable to plant growing, also waste CO₂Source of the gas.

Discharged CO₂After gas, booth closes, and plant carries out photosynthesis, carries out along with photosynthetic, indoor CO₂ Concentration starts to reduce, CO₂Concentration detection module monitors CO in real time₂Concentration, when dropping to external environment level, temperature can be opened Room booth, forced ventilation, make the Gas scavenging in booth.At this moment, the side blower fan in Fig. 2 can be closed, make gas towards one Circulate in individual direction.Fan control module, for controlling the gas circulation in greenhouse, sets the opening time interval of blower fan with every The secondary working time.

Above in conjunction with accompanying drawing, this utility model is exemplarily described, it is clear that this utility model implements and is not subject to The restriction of aforesaid way, as long as have employed changing of the various unsubstantialities that method of the present utility model is conceived and technical scheme is carried out Enter, or the most improved design of the present utility model and technical scheme are directly applied to other occasion, all at this utility model Protection domain within.

Claims (6)

1. the CO of a warmhouse booth₂Fertilization control system, it is characterised in that include that processor, key acquisition module, illumination are strong Degree acquisition module and valve control module, described processor internal memory and parameter setting module, preserve various in memorizer Plant CO under different illumination intensity₂Saturation point, processor reads plant variety data and the light of key acquisition module input The intensity of illumination detected according to intensity collection module, searches the CO that in memorizer, this kind of plant is corresponding under a certain intensity of illumination₂ Saturation point, confirms CO₂The amount of discharging, realizes CO by valve control module₂Discharge control.

The CO of warmhouse booth the most according to claim 1₂Fertilization control system, it is characterised in that described control system is also wrapped Including fan control module and blower fan (1), described blower fan (1) is in booth internal bidirectional circulating arrangement, and its direction of rotation is for making booth It is internally formed circulating current.

The CO of warmhouse booth the most according to claim 2₂Fertilization control system, it is characterised in that described blower fan (1) is highly 10 to 20 centimetres of ground of distance, forms the 10-20 degree elevation angle with ground, and the direction of rotation of blower fan (1) is for making air-flow from lower to height Place's flowing；Described blower fan (1) wind speed is located at 0.3～1.0m s^-1In the range of；The air exchanging rate of described blower fan (1) is 10h^-1, often Blower fan (1) start and stop in 6 minutes are once.

The CO of warmhouse booth the most according to claim 1₂Fertilization control system, it is characterised in that described valve one end with CO₂Source of the gas UNICOM, the other end connects airway, a diameter of 2cm of airway, and the other end is closed, at interval of 1 meter on described airway It is provided with the aperture of an a diameter of 2mm.

The CO of warmhouse booth the most according to claim 2₂Fertilization control system, it is characterised in that described control system is also wrapped Include CO₂Concentration detection module, CO₂Concentration detection module is discharging CO₂After gas fertilizer, detect CO in real time₂Concentration change, inside and outside booth CO₂After concentration is consistent, to booth forced ventilation, during to booth forced ventilation, blower fan (1) work unilateral in booth, its rotation Turn direction for making booth be internally formed one-way flow air-flow.

The CO of warmhouse booth the most according to claim 1₂Fertilization control system, it is characterised in that described CO₂The amount of discharging Compare CO₂Saturation point low.